JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE VII, 
Illustrating E. Ray Lankester’s paper on our Present Know- 
ledge of the Gregarinide. 
Fig. 
1.—Uonocystis Aphrodite, mihi, from the intestine of Aphrodite aculeata. 
Length 3; inch. 
2.—Proboscis of WM. Aphrodite. a, External membrane; 4, internal 
membrane. 
3.—Variety of IZ. Aphrodite. Length 3 inch. 
4.—Monocystis Serpule, mibi, from Serpula contortuplicata. Length 
Toh inch. 
5.—M. Serpule, with prolongation of membrane. Length 9 inch. 
6.—Two individuals of WM. Serpule, closely attached, as in Stein’s genus 
Zygocystis. Length 735 inch. 
7.—Young individual of WZ. Serpule. Length 79 inch. 
8.—Vesicle of M. Aphrodite. 
9.—Vesicle of I. Serpule. 
10, 11. 12.—Varieties of Gregarina Blattarum. Length % inch. 
13.—Vesicle of G. Blattarum. 
14.—Probable young (?) of G. Blattarum. 
15, 16.—M, Sabelle, from Sabella (Amphitrite) infundibula. Length 
Ta0 inch. 
17.—Encysted G.'Blattarum. 
18, 19.—G@. Blattarum attached one to another. 
20.—G. Blattarum, showing striated internal tunic. 
21, 22, 23, 24.—Stages in encystation of Monocystis Lumbrici. Diameter 
of cyst qos Inch. 
25.—Ordinary form of Monocystis Zumbrict. Length 75 inch. 
26.—M. Lumbrici, variety with fringed envelope. Length 3); inch. 
27.—Smaller form of same. Length 5 inch. 
28.—M. eee, with envelope composed of conical cells, 34; inch in 
ength. 
29, 30, 31.—Pseudo-Navicule after their escape from the cyst, in various 
stages of change. Juength y455 inch. 
32, 33.—Pseudo-Navicul, Psorosperms, or spindelzells, from cyst of I. 
LIumbricit. Length p55 inch. 
34.—Nematode of Lumbricus escaping from the egg. 
35.—Corpuscle from testis of IM. Lumbrici, probably young of Monocystis. 
Diameter yos5 inch. 
36.—Ameebiform corpuscle from the perivisceral fluid of Lumbricus. 
Diameter yg5 inch. 
37.—M. Lunbrici, with fringed envelope. Length 3}; inch. 
38.—WM. Lumérici, containing nucleated granules. Length ¢ inch. 
